On the show Mystery Science Theater 3000, the robot Tom Servo watched bad movies alongside host Joel Robinson and the later Mike. In season one of the show, Srvo was puppeted and voiced by Josh Weinstein. But Josh left after the season was over, leaving Servo to be done by someone new. This role was soon taken over by Kevin Murphy, who would keep the role until the show's cancellation.
Tom Servo was originally "Beeper", a robot who had a very different head and only talked through beeps. When he was changed, he was still different than he is now and was silver in color. Below is a picture of Servo as "Beeper" and the silver Servo, both from the original KTMA shows.
Pictured below is Shout! Factory's Limited Edition version of Volume XVI, which included a Limited Edition Tom Servo figurine. For MST3K DVD information, please consult my previous post about Crow T. Robot.